Figure 3

The global microstructural morphology. A cross-sectional TEM micrograph of the cooled surface region (region A) (a), with higher magnifications of the regions of the sample indicated by the dashed circle (b) and box (d). HRTEM micrographs for regions C, D and E and its corresponding FFT patterns in (c), (e) and (g); SAED pattern of the ‘dashed triangle’ of Figure 4a is shown in Figure 4 (f).